Rapid charging of the average electric car takes approximately half an hour. In the same amount of time, five of Stockholm's eight new hybrid buses can be fully charged and ready to go. These new buses have replaced the regular buses on one of the city's bus lines, as part of a project that seeks to reduce emissions from buses.
Vattenfall is supplying the buses with wind-generated electricity and is also responsible for the electrical installations, operation and maintenance.
The new plug-in hybrid buses, which are powered by electricity with the support of a biodiesel engine that can be used if needed, have been deployed on a bus line at the northern edge of central Stockholm. The buses have cut energy consumption by 60 per cent, while carbon dioxide emissions are down by a massive 90 per cent. Furthermore, GPS technology allows the electric drive to be automatically turned on in urban areas to reduce noise and air pollution.
The battery on the new buses is smaller but more powerful than that of a passenger car. It takes six minutes to give it a full charge of just under 100 kW, and it subsequently consumes approximately 1.4 kWh/km in electric mode over seven of the 8.5 kilometres covered by the route.
This is part of an EU project that seeks to evaluate chargeable hybrid buses in scheduled service. Once the project is complete, the buses will be taken over by the city of Stockholm.
Supercharging the bus of the future